static inline
size_t remaining_mmap_bytes(struct ctf_fs_ds_file *ds_file)
{
- BT_ASSERT_DBG(ds_file->mmap_len >= ds_file->request_offset);
- return ds_file->mmap_len - ds_file->request_offset;
+ BT_ASSERT_DBG(ds_file->mmap_len >= ds_file->request_offset_in_mapping);
+ return ds_file->mmap_len - ds_file->request_offset_in_mapping;
}
static
-int ds_file_munmap(struct ctf_fs_ds_file *ds_file)
+enum ctf_msg_iter_medium_status ds_file_munmap(
+ struct ctf_fs_ds_file *ds_file)
{
- int ret = 0;
+ enum ctf_msg_iter_medium_status status;
bt_self_component *self_comp = ds_file->self_comp;
bt_logging_level log_level = ds_file->log_level;
- if (!ds_file || !ds_file->mmap_addr) {
+ BT_ASSERT(ds_file);
+
+ if (!ds_file->mmap_addr) {
+ status = CTF_MSG_ITER_MEDIUM_STATUS_OK;
goto end;
}
ds_file->mmap_addr, ds_file->mmap_len,
ds_file->file ? ds_file->file->path->str : "NULL",
ds_file->file ? ds_file->file->fp : NULL);
- ret = -1;
+ status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR;
goto end;
}
ds_file->mmap_addr = NULL;
+ status = CTF_MSG_ITER_MEDIUM_STATUS_OK;
end:
- return ret;
+ return status;
}
static
enum ctf_msg_iter_medium_status ds_file_mmap_next(
struct ctf_fs_ds_file *ds_file)
{
- enum ctf_msg_iter_medium_status ret =
- CTF_MSG_ITER_MEDIUM_STATUS_OK;
+ enum ctf_msg_iter_medium_status status;
bt_self_component *self_comp = ds_file->self_comp;
bt_logging_level log_level = ds_file->log_level;
/* Unmap old region */
if (ds_file->mmap_addr) {
- if (ds_file_munmap(ds_file)) {
- goto error;
+ status = ds_file_munmap(ds_file);
+ if (status != CTF_MSG_ITER_MEDIUM_STATUS_OK) {
+ goto end;
}
/*
* last mapping where it may not be possible (since the file's
* size itself may not be a page multiple).
*/
- ds_file->mmap_offset += ds_file->mmap_len;
- ds_file->request_offset = 0;
+ ds_file->mmap_offset_in_file += ds_file->mmap_len;
+ ds_file->request_offset_in_mapping = 0;
}
- ds_file->mmap_len = MIN(ds_file->file->size - ds_file->mmap_offset,
+ ds_file->mmap_len = MIN(ds_file->file->size - ds_file->mmap_offset_in_file,
ds_file->mmap_max_len);
if (ds_file->mmap_len == 0) {
- ret = CTF_MSG_ITER_MEDIUM_STATUS_EOF;
+ status = CTF_MSG_ITER_MEDIUM_STATUS_EOF;
goto end;
}
/* Map new region */
BT_ASSERT(ds_file->mmap_len);
ds_file->mmap_addr = bt_mmap((void *) 0, ds_file->mmap_len,
PROT_READ, MAP_PRIVATE, fileno(ds_file->file->fp),
- ds_file->mmap_offset, ds_file->log_level);
+ ds_file->mmap_offset_in_file, ds_file->log_level);
if (ds_file->mmap_addr == MAP_FAILED) {
BT_COMP_LOGE("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %jd: %s",
ds_file->mmap_len, ds_file->file->path->str,
- ds_file->file->fp, (intmax_t) ds_file->mmap_offset,
+ ds_file->file->fp, (intmax_t) ds_file->mmap_offset_in_file,
strerror(errno));
- goto error;
+ status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR;
+ goto end;
}
- goto end;
-error:
- ds_file_munmap(ds_file);
- ret = CTF_MSG_ITER_MEDIUM_STATUS_ERROR;
+ status = CTF_MSG_ITER_MEDIUM_STATUS_OK;
end:
- return ret;
+ return status;
}
static
*/
if (remaining_mmap_bytes(ds_file) == 0) {
/* Are we at the end of the file? */
- if (ds_file->mmap_offset >= ds_file->file->size) {
+ if (ds_file->mmap_offset_in_file >= ds_file->file->size) {
BT_COMP_LOGD("Reached end of file \"%s\" (%p)",
ds_file->file->path->str, ds_file->file->fp);
status = CTF_MSG_ITER_MEDIUM_STATUS_EOF;
*buffer_sz = MIN(remaining_mmap_bytes(ds_file), request_sz);
BT_ASSERT(ds_file->mmap_addr);
- *buffer_addr = ((uint8_t *) ds_file->mmap_addr) + ds_file->request_offset;
- ds_file->request_offset += *buffer_sz;
+ *buffer_addr = ((uint8_t *) ds_file->mmap_addr) + ds_file->request_offset_in_mapping;
+ ds_file->request_offset_in_mapping += *buffer_sz;
goto end;
error:
}
static
-enum ctf_msg_iter_medium_status medop_seek(enum ctf_msg_iter_seek_whence whence,
- off_t offset, void *data)
+enum ctf_msg_iter_medium_status medop_seek(off_t offset, void *data)
{
- enum ctf_msg_iter_medium_status ret =
- CTF_MSG_ITER_MEDIUM_STATUS_OK;
+ enum ctf_msg_iter_medium_status status;
struct ctf_fs_ds_file *ds_file = data;
off_t offset_in_mapping, file_size = ds_file->file->size;
bt_self_component *self_comp = ds_file->self_comp;
bt_logging_level log_level = ds_file->log_level;
- if (whence != CTF_MSG_ITER_SEEK_WHENCE_SET ||
- offset < 0 || offset > file_size) {
- BT_COMP_LOGE("Invalid medium seek request: whence=%d, offset=%jd, "
- "file-size=%jd", (int) whence, (intmax_t) offset,
- (intmax_t) file_size);
- ret = CTF_MSG_ITER_MEDIUM_STATUS_INVAL;
+ if (offset < 0 || offset > file_size) {
+ BT_COMP_LOGE("Invalid medium seek request: offset=%jd, file-size=%jd",
+ (intmax_t) offset, (intmax_t) file_size);
+ status = CTF_MSG_ITER_MEDIUM_STATUS_INVAL;
goto end;
}
* Determine whether or not the destination is contained within the
* current mapping.
*/
- if (offset < ds_file->mmap_offset ||
- offset >= ds_file->mmap_offset + ds_file->mmap_len) {
- int unmap_ret;
+ if (offset < ds_file->mmap_offset_in_file ||
+ offset >= ds_file->mmap_offset_in_file + ds_file->mmap_len) {
BT_COMP_LOGD("Medium seek request cannot be accomodated by the current "
"file mapping: offset=%jd, mmap-offset=%jd, "
- "mmap-len=%zu", (intmax_t) offset, (intmax_t) ds_file->mmap_offset,
+ "mmap-len=%zu", (intmax_t) offset, (intmax_t) ds_file->mmap_offset_in_file,
ds_file->mmap_len);
- unmap_ret = ds_file_munmap(ds_file);
- if (unmap_ret) {
- ret = CTF_MSG_ITER_MEDIUM_STATUS_ERROR;
+ status = ds_file_munmap(ds_file);
+ if (status != CTF_MSG_ITER_MEDIUM_STATUS_OK) {
goto end;
}
goto map_requested_offset;
} else {
- ds_file->request_offset = offset - ds_file->mmap_offset;
+ ds_file->request_offset_in_mapping = offset - ds_file->mmap_offset_in_file;
goto test_end;
}
offset_in_mapping = offset %
bt_mmap_get_offset_align_size(ds_file->log_level);
- ds_file->mmap_offset = offset - offset_in_mapping;
- ds_file->request_offset = offset_in_mapping;
- ret = ds_file_mmap_next(ds_file);
- if (ret != CTF_MSG_ITER_MEDIUM_STATUS_OK) {
+ ds_file->mmap_offset_in_file = offset - offset_in_mapping;
+ ds_file->request_offset_in_mapping = offset_in_mapping;
+ status = ds_file_mmap_next(ds_file);
+ if (status != CTF_MSG_ITER_MEDIUM_STATUS_OK) {
goto end;
}
test_end:
ds_file->end_reached = (offset == file_size);
+
+ status = CTF_MSG_ITER_MEDIUM_STATUS_OK;
end:
- return ret;
+ return status;
}
BT_HIDDEN
projects / babeltrace.git / blobdiff